3com 8807 Reference Guide

isis timer holding-multiplier value [ level-1 | level-2 ]

undo isis timer holding-multiplier [ level-1 | level-2 ]

Interface view

value: Number of consecutive Hello packets that haven’t been received from the 
IS-IS neighbor for it to be considered dead. It ranges from 3 to 1000.

level-1: Level-1 IS-IS neighbor.

level-2: Level-2 IS-IS neighbor.

If you do not specify Level-1 or Level-2, the command applies to both Level-1 and 
Level-2 IS-IS neighbors.

Use the isis timer holding-multiplier command to set the number of 
consecutive Hello packets that haven’t been received from the IS-IS neighbor for it 
to be considered dead.

Use the undo isis timer holding-multiplier command to restore the default 
setting.

By default, an IS-IS neighbor is considered dead if three consecutive Hello packets 
haven’t been received from it.

Given a broadcast network, you may configure this command specific to Level-1 
or Level-2 neighbors by specifying the keyword level-1 or level-2.

Given a PPP link, you do not need to specify Level-1 or Level-2, because only one 
kind of Hello packet is available.

This command virtually specifies a hold-down time. If the local router does not 
receive any Hello packet from the peer within this time, the peer is considered 
dead.

The hold-down time is configured on a per-interface basis. Within one area, 
routers may have different holddown time settings.

To tune the hold-down time on a router, change the Hello timer setting of IS-IS or 
change the number of consecutive Hello packets that haven’t been received from 
an IS-IS neighbor for it to be considered dead.

Related command: isis timer hello.

# On Vlan-interface 10, configure that the IS-IS neighbor is considered dead if five 
consecutive Hello packets haven’t been received from it.